Skin packaging machine



FIG. 1 is a front, left perspective view of the skin packaging machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view taken from the right of FIG. 1;

FIG. 7 is a side view taken from the left of FIG. 1. 

The ornamental design for a skin packaging machine, as shown and described. 